Two revampings of air preheater of fired heater in atmospheric-vacuum distillation unit of a refinery was introduced.
介绍对某炼油厂常减压蒸馏装置加热炉空气预热系统的两次改造情况。
Heating device: Electric heater unit and hot air circling type to dehumidification.
加热装置：电加热装置和热风循环进行除湿。
Heating device: Electric heater unit and hot air circling type to dehumidification.
加热装置：电加热装置和热风循环进行除湿。
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